Hey there @SavorRVA!
This is definitely becoming a popular topic! Can you provide us with just a little more info? Is the plan for there always to be two adults in the kayak or potentially one adult and one child or two children?
It is hard to nail down exactly what contributes to the weight difference as it is subjective to features from specific model to model.
From the previous recommendation, are you leaning towards a few options that maybe we could advise on specifically?
I will say that Advanced Elements does have a good recommendation for being easy to use, dependable, and durable. The convertible tandem kayak that @REI-JohnJ mentioned is great because of the versatility! Not to mention with a 500+ pound capacity, you can add the kiddos in fairly easily.